Cement-retainer.



R. C. BAKER.

CEMENT RETAINER.

APPLIoATIoN Hum .11.11.29, 1912.

Patented Aug. 13,1912.

Inventor Witn'esses Attorneys Ualemania c. BAKER, oF-GOALINQA.CALIFORNIA.

CEMENT-RETAINER.

Specification of Letters Iatent.

Patented Aug. 13,1912.

w. yApplication Sled January 29, 1918. Serial No. 674,065.

To aZL wiz-om t may concern.'

Be it known that I, Rennen C.'- BAKER, a citizen of the `United-States,residing at Coalinga, inthe county of Fresno and State of California,have-mvented a new and useful Cement-Retainer, of which the-'followingis a specification. n

'By way ofV explanation, 1t:-may he stated that in the operation ofdrilling and-prpmg a Well, the tubing .occasionally becomes lodged inthebore, before-the bore. has. been tubed tothe bottom, under suchcircumstances, the tubing may .be flooded by water derived from an'intermediate source, and not from the bottom of the well, presupposingthat the well-has been sunk for the urposeof obtaining water from alower evel than that at which 'the water enters. Under suchcircumstancesV it is necessary to seal the space between the tubing andthe bore of the well, and to that Iend, cement must be introducedbetween the tubing and the bore.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and 1n the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of invention herein disclosed can be made within the scope ofwhat is claimed without depart-ing from the spirit of the invention.

In the drawings,-Figure 1 shows in longitudinal section, a deviceconstructed in accordance with the present invention, the same beinglocated wlthin the Well tubin the view depicting the parts as they Wilappear previous to the elevation of the barrel; Fig. 2 is a similarview, showing the barrel elevated and the cement in posltion about the'barrel; and Fig. 3 is a transverse section upon the line 3-3 of Fig. 1.

In carrying out the invention there is provided a barrel 1 closed at thelower end, as shown at 2. The lower extremity of the barrel 1 flares, asshown at 3. A closure 4 is provided for the upper end of the barrel 1,the closure 4 consisting of a top plate 5 and a flange V6, the liange 6being right-hand threaded into the barrel 1. The top plate 5 projectsbeyond the eriphery of the barrel 1. Left-hand threa ed as shown at 7,into the topplate 5 of the closure 4, is a supply pipe 8. .Surroundingthe barrel 1 is an inner conlcal sleeve 9, and surrounding the mnerconical sleeve 9 is an outer conical sleeve 10. The base of the sleeve 9is downwardly disposed, and the base of the sleeve 10 1s upwardlydisposed, the inner and outer faces of the sleeves9 and 10,respectively, belnga proximately parallel, while the adjacent aces ofthe sleeves 9 and 10 engage wedge-wlse, as shown at 11. The outer faceof the outer sleeve 10 is provided with a series of ribs or projections12. A yieldable, and preferably resilient, annular packing 14 surroundsthe barrel 1.

1 In practical operation, the parts are positioned as shown in Fig. 1,the sleeves 9 and'l() being disposed beneath, and engaged by, thek topplate 5 of the closure 4. The packing ring 14 surrounds the cylindricalportion of the barrel 1, above the flaring portion' 3l thereof. Thedevice is lowered within the tubing 15, to the desired point, whereuponthe barrel 1 is raised, by means of the tubing or pipe 8, as shown inFig. 2. The upward movement of the barrel 1 will cause the inner conicalmember 9 to force the outer conical member 10 outwardly, so that theprojections 12 thereof will engage with the tubing 15, it being notedthat the outer conical member 10 is yieldable, this result being acuired, when desired, by splitting the mem er 10, as shown at 16. As thebarrel 1 moves upwardly, within the inner conical member 9, to cause theouter conical member 10 to expand radially, as hereinbefore described,the tubular packing 14 will be pressed against the butt end of theconical member 9, and the flarin end 3 of the barrel 1 will enter thepacklng 14, expanding the same against the tubing 15, and effecting aclosure between the barrel 1 and the tubing 15.

When the parts are positioned as hereinbefore described, the cement,preferably in the form of a thin grout is forced downwardly through thesupply pipe 8, into the against thebot-tom 2 of the barrel, and atV theother end bearing against a suitable head 22, outstanding from the stemportion 2O of the valve in which spring 2l the valve stem is slidable.The valve head 19 closes toward the supply pipe 8, and obviouslypermitsl the cement to pass down'- wardly through the device, withoutpermitting the cement to pass in an opposite direct-ion. When the cementis hardened suficiently, the supply pipe 18 is unthreaded from theclosure. 4.\ The device is preferably fashioned from cast iron, andconseuently may be drilled out readily when esired.

It will be readily understood that should it be desired to close thetubing 15, above the barrel l, a mass of cement may be deposited upontop of the closure 4. This operation is peculiarly desirable when, as isoften the case, there exists at the bottom of the well gas, rapidlyowing water or the like, preventing a proper hardening of the cement,when the same is deposited at the bottom of the tubing, as shown in Fig.2.

Having thus described the invention, what is claimed is 1. In a deviceof the class described, a barrel provided at its lower end with adownwardly flared portion; coperating inner and outer wedges upon theoutside of the barrel, the outer wedge having its wider end disposedupwardly and the inner wedge having its wider end disposed downwardly;and a resilient packing surrounding the barrel; the inner wedge beingactuatable by the barrel, when the barrel is lifted, to eX- pand theouterwedge radiall of the barrel, and to causethe wider en of the inner,

barrel; a supply pipe entering the top of the barrel; a valve in thebottom of the barrel, opening away from the supply pipe; and mechanismupon the outside of the barrel and operable when the barrel is moved bymeans of the supply pipe to effect a sealing of the space surroundingthe barrel.

3. In a device of thepclassA described, a barrel provided with a flaringlower end; a supply pipe entering the top of the barrel; a valve in thebottom of the barrel, opening away from the supply pipe; inner and outerconical sleeves surrounding the barrel; a yieldable packing surroundingthe barrel; the barrel being liftable, by means of the supply pipe, tocause the inner sleeve to expand the outer sleeve radially, and to causethe inner sleeve to engage the packing, to force the packing upon theflared end of the barrel, thereby to expand the packing radially.

In testimony that `I claim the foregoing as my own, I have hereto aixedmy signature in the presence of two witnesses.

REUBEN C. BAKER.

Witnesses:

J. A. STEELE, W. L. HAZEN.

